If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Name a key which is hardest to turn.

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

Out of four images which one is the odd one out?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What has one eye, but can’t see?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?